startiing to clean up c api

include/zaprus.h

@@ -11,36 +11,5 @@ int zaprus_send_relay(const char* payload, size_t len, char dest[4]);
 
 int zaprus_send_initial_connection(const char* payload, size_t len, uint16_t initial_port);
 
-struct SaprusMessage* zaprus_connect(const char* payload, size_t len);
+void* zaprus_connect(const char* payload, size_t len);
 
-// message
-#define SAPRUS_RELAY_MESSAGE_TYPE 0x003C
-#define SAPRUS_FILE_TRANSFER_MESSAGE_TYPE 0x8888
-#define SAPRUS_CONNECTION_MESSAGE_TYPE 0x00E9
-
-struct SaprusMessage {
-  uint16_t packet_type;
-  uint16_t payload_len;
-  union {
-    struct {
-      char dest[4];
-    } relay;
-    struct {
-      uint16_t src_port;
-      uint16_t dest_port;
-      uint32_t seq_num;
-      uint32_t msg_id;
-      char _reserved;
-      char options;
-    } connection;
-  } headers;
-  char *payload;
-};
-
-// ptr should be freed by the caller.
-int zaprus_message_to_bytes(struct SaprusMessage msg, char** ptr, size_t* len);
-
-// Return value should be destroyed with zaprus_message_deinit.
-struct SaprusMessage* zaprus_message_from_bytes(const char* bytes, size_t len);
-
-void zaprus_message_deinit(struct SaprusMessage* msg);

src/c_api.zig

@@ -1,64 +1,3 @@
-const c = @cImport({
-    @cInclude("zaprus.h");
-});
-
-fn zigToCMessage(msg: zaprus.Message) !c.SaprusMessage {
-    return switch (msg) {
-        .relay => |r| .{
-            .packet_type = @intFromEnum(msg),
-            .payload_len = @intCast(r.payload.len),
-            .headers = .{ .relay = .{
-                .dest = r.header.dest,
-            } },
-            .payload = @constCast(r.payload.ptr),
-        },
-        .connection => |con| .{
-            .packet_type = @intFromEnum(msg),
-            .payload_len = @intCast(con.payload.len),
-            .headers = .{ .connection = .{
-                .src_port = con.header.src_port,
-                .dest_port = con.header.dest_port,
-                .seq_num = con.header.seq_num,
-                .msg_id = con.header.msg_id,
-                ._reserved = con.header.reserved,
-                .options = @bitCast(con.header.options),
-            } },
-            .payload = @constCast(con.payload.ptr),
-        },
-        .file_transfer => return zaprus.Error.NotImplementedSaprusType,
-        else => return zaprus.Error.UnknownSaprusType,
-    };
-}
-
-fn cToZigMessage(msg: c.SaprusMessage) !zaprus.Message {
-    const msg_type: zaprus.PacketType = @enumFromInt(msg.packet_type);
-    return switch (msg_type) {
-        .relay => .{
-            .relay = .{
-                .header = .{
-                    .dest = msg.headers.relay.dest[0..4].*,
-                },
-                .payload = msg.payload[0..msg.payload_len],
-            },
-        },
-        .connection => .{
-            .connection = .{
-                .header = .{
-                    .src_port = msg.headers.connection.src_port,
-                    .dest_port = msg.headers.connection.dest_port,
-                    .seq_num = msg.headers.connection.seq_num,
-                    .msg_id = msg.headers.connection.msg_id,
-                    .reserved = msg.headers.connection._reserved,
-                    .options = @bitCast(msg.headers.connection.options),
-                },
-                .payload = msg.payload[0..msg.payload_len],
-            },
-        },
-        .file_transfer => return zaprus.Error.NotImplementedSaprusType,
-        else => return zaprus.Error.UnknownSaprusType,
-    };
-}
-
 // client
 export fn zaprus_init() c_int {
     SaprusClient.init() catch return 1;
@@ -75,49 +14,16 @@ export fn zaprus_send_relay(payload: [*]const u8, len: usize, dest: [*]u8) c_int
     return 0;
 }
 
-export fn zaprus_send_initial_connection(payload: [*]const u8, len: usize, initial_port: u16) c_int {
-    _ = SaprusClient.sendInitialConnection(payload[0..len], initial_port, allocator) catch return 1;
+export fn zaprus_connect(payload: [*]const u8, len: usize, output: *SaprusConnection) c_int {
+    output.* = (SaprusClient.connect(payload[0..len], allocator) catch return 1).?;
     return 0;
 }
 
-export fn zaprus_connect(payload: [*]const u8, len: usize) ?*c.SaprusMessage {
-    if (SaprusClient.connect(payload[0..len], allocator)) |msg| {
-        var m = zigToCMessage(msg) catch return null;
-        return &m;
-    } else |_| {
-        return null;
-    }
-}
-
-// message
-
-/// ptr should be freed by the caller.
-export fn zaprus_message_to_bytes(msg: c.SaprusMessage, ptr: *[*]u8, len: *usize) c_int {
-    var m = cToZigMessage(msg) catch return 1;
-    const bytes = m.toBytes(allocator) catch return 1;
-    ptr.* = bytes.ptr;
-    len.* = bytes.len;
-    return 0;
-}
-
-/// Return value should be destroyed with zaprus_message_deinit.
-export fn zaprus_message_from_bytes(bytes: [*]const u8, len: usize) ?*c.SaprusMessage {
-    if (zaprus.Message.fromBytes(bytes[0..len], allocator)) |msg| {
-        var m = zigToCMessage(msg) catch return null;
-        return &m;
-    } else |_| return null;
-}
-
-export fn zaprus_message_deinit(msg: *c.SaprusMessage) void {
-    if (cToZigMessage(msg.*)) |m| {
-        m.deinit(allocator);
-    } else |_| unreachable;
-}
-
 const std = @import("std");
 
 const zaprus = @import("./root.zig");
 const SaprusClient = zaprus.Client;
+const SaprusConnection = zaprus.Connection;
 
 const allocator = std.heap.c_allocator;